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[Oliver]

Now I'm thinking an assembly that does not need to use batteries either, only a solar panel and a small circuit with a large capacitor, allowing use citrine, no battery charging times, obviously, is +50 hours of battery time more than enough, but I think it's interesting to get a rig that only require a light source, although this is artificial, and a solar panel, no battery, using the energy at the same time it is produced by plaque.

It may be possible, for I have seen solar panels for cars, 30 cm * 10 cm and very thin, used to recharge car batteries, and are capable of delivering 12 Volt and 125 mA in the best conditions, which possibly guarantee us at least 30 mA and + 8 Volts under conditions of cloudy days or use of artificial light, at first all the energy surplus is used to recharge the large capacitor through a transistor, if the primary source fails, use momentarily the energy stored in the capacitor, which is the correct voltage and deliver the right degree, possibly for more than 30 ~ 60 minutes without any kind of auxiliary power, and obviously with the lights out, though admittedly it is hard to play, the point is not that, but stabilize the supply of solar panel.

The cost should be much lower, as are the more expensive lithium batteries, which the system lacks, and there is no life cycle of these batteries.

If I had a good destination, I will tell you something.

greetings from Spain, Oliver